Oil burner



Aug. 17 1926.

J. S. BURNS OIL BURNER Filed Jan v 314mm 4 or 0%,? 5 Eur/75 atlu wcq Patented Aug. 17, 1925.

T an STATES JOHN S. BURNS, OF .NEW ORLEANS, LOUISIANA.

OIL BURNER.

Application filed January My invention 'relates to improvements in oil burners, but has special reference to devices wherein crude oil is atomized by steam or air, and mixed therewith, in order to render it infective for com'bustive or heating purposes.

Heretofore in the art, atomization has been effected by the use of air or steam, the means for regulating the flow of the air and oil comprising valves or similar devices. As will presently appear, my invention dispenses with the use of valves or the like and depends solely on the use of certain baffles, adjustably positioned within the body of the burner.

One of the objects of the invention is the production of a burner wherein the air or steam and the crude oil will mix at a point in the burner for securing the highest efficiency and whereby the fuel oil will be prevented from drawing back into the air or steam conduit in the event the supply of oil increases beyond a safe atomization point.

Another object resides in the provision of means adjacent the tip of the. burner'for breaking up the particles of fuel oil to the end that choking dangers may be reduced to a minimum and further obviating the necessity for screens or other separating means in the fuel oil or steam line.

A further object of the invention is to provide a burner tip having a simple and effective means for breaking up the particles of fuel oil with the air or steam, thereby providing a perfected means by atomization of the fuel oil and also producing a combustible mixture of the highest efliciency and economy. The fuel and steam regulating means being independently operable and the flow of either being regulated within its minimum and maximum at each stage of adjustment of theother.

A still further object of the invention is to produce a burner which is extremely simple, economical in construction and efficient in operation, being easily installed and having but few working parts.

Other objects and advantages will be apparent as the nature of the invention is better set forth, and it will be understood that changes within the scope of the claims may be resorted to liberally without departin from the spirit of the invention.

in the drawings, forming a portion of this specification and in which like numerals of 2, 1926. Serial No. 78,874.

reference indicate similar parts in the several views:

Figure 1 is an elevation of my improved burner.

Fig. 2 is a central longitudinal vertical sectional view of the same.

Fig. 3 is a vertical transverse section taken substantially on the plane of the line 33 of Fig. 2. V

Fig. 4: is a detail view of a mixing member, and

Fig. 5 is another detail view illustrating one of the spacer elements.

Referring now more particularly to the drawing, there is shown a burner comprising a tube 10 inclosing an inner tube 11, the latter being arranged concentric with the former, (see '2).

One end of said tube 10 carries a burner tip 12, while the other end is threadedly secured to a fitting 13, having a fuel inlet 13?. Means for securing my bnrner to a furnace front is provided in the form of an annular flange 14, which engages the plug 15, the latter in turn being secured to said tube 10 adjacent the fitting 13, as clearly shown in the drawings.

Said inner tube 11 has its ends terminating short of the ends of said tube 10, its extremity adjacent the burner tip 12 carrying a reducing nipple 16, while its other end supports an enlarging nipple 17, the latter being substantially in the path of the fuel oil and the inrushing steam.

By the use of the reducing nipple 16 I am enabled to increase the length of the inner tube 11, so to speak, and at the same time decrease its diameter, both of which being effected by the employment of the extension 21 which has its forward end projecting well into the burner tip. Said nipple 16 also carries a mixing cone 19 exteriorly thereof, the flaring ends of the latter, with the exception of the orifices 20, completely sealing the space exteriorly of the inner tube 11. Expressed differently, this cone acts as a barrier of the incoming fuel oil and naturally retards its passage but increases its velocity by limiting the exit space.

The fitting 13 carries a steam nozzle 22, having its forward end tapered and fitting within said nipple 17 as indicated at 23 Means" for retarding the flow of fuel oil about the inner tube 11 is provided in the form of baflie washers 25, backed by nuts 26. which threadedly engage said tube 11 and since the latter is threaded substantially its longitudinal dimension, said baffles may be adjusted according to the demands of the SeTVlCe.

The burner tip is provided With the usual opening 12, and rearWa-rdly thereof, but directly in front of the extension 21, is a transverse pin 12, Which causes the discharging fuel oil to spray in fan-shaped and finally breaking up they particles of oil into minute parts so as to form perfect atomization.

The foregoing comprises the essential parts. of my burner wherein it Will be observed that I have provided an extremely simple device having a steam inlet 23 and an oil inlet 13 I have also provided means to retard the flow of the fuel oil about the tube 11 by the use of baffles adapted for adjustable positioning on said tube. Finally I adopt the simple expedient of a pin 12 Which breaks up the fuel after emergence from the orifices 20, into a multiplicity of streams.

I claim:

1. An oil burner comprising an outer tube, an inner tube concentric therewith, said tubes defining fuel and steam passages, a

burner tip carried by said outer tube, an orificed mixing cone carried by said inner tube and acting as an impediment in said fuel passage, a fitting carried by the other end of said outer tube, a steam nozzle having its end Within said outer end of the first-named tube, adjustable baffling means carried by said inner tube and in the path of the fuel and a transverse pin arranged in said burner tip.

An oil burner comprising an outer tube, an inner tube concentric therewith, said tubes defining fuel and steam passages, a burner tip carried by said outer tube, an orificed mixing cone carried by said inner tube, a reduced extension concentric with said mixing cone, a fitting carried by the other end of said outer tube, a steam nozzle having its end within said outer end of the outer tube, baffling means comprising a plurality of disks adjustably arranged in the fuel passage and a transverse pin carried by said burner tip for intercepting the passage of the atomized fuel.

In testimony whereof I aflixed my signature.

JOHN S. BURNS. 

